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在岩土地下换热器G函数理论的基础上,建立地源热泵热力系统模拟计算模型,提出了基于模型的系统长期运行状况分析方法。以严寒地区为例研究了近三年冬季供暖过程运行状况,模拟分析了地下换热器进、出口流体温度变化规律、热泵机组能效比和系统能耗特性,并与实测结果进行了对比。结果证明了模型及分析方法可行,可为进一步开展更广泛的预测分析提供有效途径。
Based on the G function theory of geothermal heat exchanger, a simulation model of geothermal system heat pump system is established, and a model-based long-term operating condition analysis method is proposed. Taking the severe cold area as an example, the operating status of the winter heating process in recent three years was studied. The variation of fluid temperature at the inlet and outlet of the underground heat exchanger, the energy efficiency ratio of the heat pump unit and the system energy consumption characteristics were simulated and compared with the measured results. The result proves that the model and the analysis method are feasible, which can provide an effective way to carry on a wider range of prediction and analysis.